What is the use of tokens in dotliquid Tag

[Laksh Parab]

In dotliquid we can create custom tag like below

public class Random : DotLiquid.Tag
{
    private int _max;

    public override void Initialize(string tagName, string markup, List<string> tokens)
    {
        base.Initialize(tagName, markup, tokens);
        _max = Convert.ToInt32(markup);
    }

    public override void Render(Context context, TextWriter result)
    {
        result.Write(new Random().Next(_max).ToString());
    }
}

The initialize method takes tokens as 3rd parameter. What is the use of tokens parameter and how they are being passed to the Initialize method from the template?